I have an issue on 3 different Computers using Hitfilm. I had it with Hitfilm Pro 2017 as well as he new Version.
When I set 4 views - Active camera, Top, Left, Perspective in 3 D with different layers and I Change Position of one object or layer it does not affect all views. The Frame (or whatevet it is called; the mark around the Frame) ist moving, but the Content stays where it is.
Example: a small Picture is moved, so the Frame around the Picture is moving in all views, the Content of the Picture stays where it is.
When skipping one Frame Forward or back or repositioning the playhead every view is updated.
Since I have it on different machines as well as with two versions I suggest this is a bug.